In order to know if a Silver Arowana is male or female, you need to look at the size of the fish. The male fish are bigger in size.
If the fish is male it will be bright and colourful, if it is female it will be quite dull
male is huge and grey female is colurful
What exactly is a fish coin?
flowron
the rosy red fish is the boy.
the female beta fish is "plainer" than the male as where the male is a darker shade near the face and lighter shade near the tail.
they females are brighter and the males are paler
The males have a red tail.
Your betta fish is a female if she has smaller fins than an average male.
If it tries to pinch you it's a female if it's calm and doesn't pinch you it's a male
Feeder fish, How do you tell male from female of the?